Scuba Choice Scuba Diving Stainless Steel Spring Fin Straps Pin Style - Pair Available size: S (9" long), M (9.5" long), L (10" long), XL(11" long), XXL(12" long) Easy to install Durable Stainless Steel material. Pin style strap for ScubaPro Twin Jet, Scubapro Jet, Aqua-Lung (U.S. Divers) Rocket, XS Scuba Power, Ocean Management Systems (OMS) Slipstream, International Divers Inc (IDI) Power, International Divers Inc (IDI) Frog Foot and most other metal type fin buckles